This UHDe4X1 HDMI 2.0 4K@60Hz HDR Dolby Vision Switch is made to work with latest generation HDMI sound bar and receiver with an eARC or ARC HDMI port. The package includes: the UHDe4X1 switch, 100V-240V AC to 5V DC power adapter with US plug, IR remote and user manual. | UHDe4X1 has 4 HDMI inputs and 1 HDMI output; the HDMI input #1 should be connected to the HDMI eARC port of the sound bar or receiver for eARC audio application. Connect the HDMI source, such as a Blu-ray player to the HDMI input 2/3/4 of this switch. The HDMI audio signal from the selected HDMI input source can be extracted and sent to the eARC HDMI port of a sound bar or receiver from HDMI input #1 port. Make sure to use "Auto" setting for the audio EDID selection. | If the HDMI output is connected to the ARC / eARC port of the TV, then the TV can send ARC audio to the ARC or eARC port of the sound bar or receiver connected to HDMI input #1, when the eARC mode is enabled. When the audio signal is from the TV, make sure to select input 1 of the switch. Make sure to enable CEC and ARC mode on the TV for TV's eARC application. | The TV doesn't need to have ARC or eARC port to use this model. If the TV has ARC or eARC port, then just select input #1 and enable eARC mode, for the TV to send ARC audio; enable the eARC mode and select the desired input source (2/3/4) to extract HDMI audio for the sound bar or receiver. | eARC is backward compatible with ARC, so this model also supports ARC HDMI ports. When the eARC mode is not used / disabled, this switch can be used as a regular 4x1 switch; when the eARC mode is enabled, this switch can only be used as a 3x1 switch, because input #1 needs to be connected to the eARC port of the sound bar / receiver. The eARC audio extractor does not support the regular HDMI input of a sound bar, it must use the eARC HDMI port for audio extraction application.